For 2009, the monthly federal benefit rate for SSI is $674.00 not $1011.00.
And illegals cannot qualify for SSI (yet).
In a few months, there will not be any more illegal aliens. The amnesty will cover anyone in the country now plus many others who crash the unguarded borders in the coming months. Family unification will bring hordes more in the coming hears. SSI is only a small part of the welfare showered on new immigrants, especially for elderly parents and relatives of naturalized citizens.
My bad. You are right. The $674 is for a single payee, the $1011 is for a couple, neither of whom worked long enough in this country to qualify for SS. To get the $1011, both grandman AND grampa have to immigrate here (from countries that have no Social Security whatsoever, which is most of the Third World.)